[Objective] To analyze the feasibility of fuzzy evaluation method in stability evaluation of mined-out area.[Methods] We divided the driving factors of the stability of mined-out area into four classes:geological factors, mined-out factors, external factors and time factor; divided the secondary factors into eight elements, including buried characteristics of coal seam, tectonic characteristics, physical and mechanical properties of the overlying strata, hydrogeology feature, refine formation, buried depth of coal seams, thickness of loose layer, and so on; divided the stability of mined-out area into three grades:less stability, instability and extremely instability. We used fuzzy analytic hierarchy process to establish evaluation stability model, and to construct the comparison matrix. We took Fenghuangshan mine area as a case study to evaluate the stability.[Results] The study area was found to be extremely instable, and the result is consistent with the site investigation.[Conclusion] Fuzzy evaluation method is feasible and can be applied to other mined-out areas. It can also provide guides to mine areas for rational planning and mine exploitation, having practical value.